Abstract: Color sensors have broad applications in spectroscopy, medical imaging, and CMOS-based cameras. One of the fundamental challenges in this field is implementing a dynamically tunable filter ...

Abstract: This paper presents a photoacoustic spectroscopy (PAS) gas sensor based on a novel π-type Helmholtz photoacoustic cell (πH-PAC) for the first time. The acoustic properties of the πH-PAC were ...

Small cells take advantage of existing street assets, such as telephone boxes, lamp posts, and CCTV columns. They are seen as a simpler alternative to bulkier telecom infrastructure, which might look ...

Whether you use an armband or chest strap, add some smarts to your exercise and training routine with one of the top heart rate monitors we've tested. I'm PCMag's managing editor for consumer ...